Want to buy a tablet, Realme pad looks good but reviewers are saying it lagg's sometimes plus not many apps are tablet optimized. Another option is samsung A8 but has a no name unisoc proccy and tft screen,only good thing is samsung after sales support and the amount of cashback offers given by multiple banks currently.
will buying a s6 lite for 30k(27k after cashback) be worth it comes with s pen,same tft screen.
usage would be browsing,note taking,live graphical,geological weather charts etc. Ipad normal at 27k seems nice but screen size is bit small and have to carry a internet dongle everywhere.
So, based on the above you want to buy a tab that supports wi-fi + sim, has a screen larger than 10.4 inches, and supports a stylus for note-taking. Few things things that I would like to point out here
1. In your budget of 15-20K, even 30K, you won't get all these features in one tab. So you'll have to compromise somewhere. Keeping that in mind, here are the options below.
2. You can get the Samsung A7 ( Wifi + 4G sim) model within 20k (18kish). This however does not support a stylus.
2. You will not get a stylus-supporting tablet in your budget of 20k. The cheapest Android tab that comes with a stylus is a Lenovo tab (wifi +4G) for around 23-24k. If you plan to spend that much, then you might as well go for an Ipad for around 27-28k but then you said screen size is an issue ( which will remain with the Samsung or Lenovo models too btw) plus it is wi-fi only. On the bright side, you don't need to buy an apple pencil to use with the iPad. I use a CaseU pen and I easily write 2000+ words every day using that. Had no problems so far.
3. S6 lite can be an option for you if you want to stick to Android only. However, how do you plan to circumvent the screen size issue (again)? In your budget, even up to 30k there is no 11-inch + tab available.
4. Your use case doesn't seem to be a resource hog although I don't understand what you mean by "live graphical".
At the EOD, you'll need to make up your mind about which features you can let go of.